POWER ELECTRONICS
VS65
SAFETY INSTRUCTIONS
9
PRECAUTIONS
Electric shock prevention:
The enclosure of the starter cabinet must be grounded properly to keep away
from the electric shock even if electric leakage on the enclosure. Disconnect all
power supplies before maintenance for soft starter or motor. Due to storage
function of internal RC circuit, the triggering component will keep dangerous
voltage even if the main power supply is cut off. Use a connection wire to
short-circuit it with ground in order to discharge the voltage.
Compensation capacitance:
The non-active power compensation capacitance is used to raise power factor
must be connected to VS65 soft starter’s input terminal and not connect to the
output terminal; otherwise, the soft starter’s controlled silicon power device
may be damaged.
Insulation test:
To test voltage withstanding ability of the 3-phase supply to ground, have to
take off all circuit control boards. Using a M ohm meter to measure the
insulation voltage withstanding of control board to ground is also forbidden.
Low-voltage test:
The test should be strictly in accordance with operating instructions. The low-
voltage terminal of the voltage transformer should be disconnected.
Input & output:
Do not make mistakes when connecting input and output terminals of the VS65
soft starter’s main loop; otherwise, there may be result in the unexpected
actions of the soft starter, which could damage the starter and motor.
TRIAL RUN
Before commissioning the softstarter, please, read section 8 of this manual
referred to power cabinet.
Verify all parameters before operating the softstarter. Alteration of parameters
may be required depending on application and load.
Always apply voltage and current signals to each terminal that are within levels
indicated within this manual. Otherwise, damage to the softstarter may result.
EARTH CONNECTION
Connect only to the dedicated ground terminal of the softstarter. Do not use the
case or the chassis screw for grounding.
When installing, grounding wire should be connected first and removed last.
The earth cable must have a minimal cross sectional area that meets local
country electrical regulations.
Motor ground must be connected to the softstarter ground terminal and not to
the installation’s ground. We recommend that the section of the ground
connection cable should be equal or higher than the active conductor.
Installation ground must be connected to the softstarter ground terminal.
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